<template>
  <div class="count">
    <h2>当前求和为：{{$store.state.sum}}</h2>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment">+</button>
    <button @click="decrement">-</button>
    <button @click="incrementOdd">当前和为奇数再加</button>
    <button @click="incrementWait">等一等再加</button>
  </div>
</template>

<script>
  export default {
    name:'Count',
    data() {
      return {
        n:1
      }
    },
    methods: {
      increment(){
        // 下面这行代码，属于非法修改state（直接修改）是不合法的
        this.$store.state.sum += this.n
      },
      decrement(){
        
      },
      incrementOdd(){
        
      },
      incrementWait(){
        setTimeout(() => {
         
        }, 1000);
      }
    },
    mounted() {
      console.log('Count',this.$store)
    },
  }
</script>

<style scoped>
  .count {
    background-color: skyblue;
    padding: 10px;
    box-shadow: 0 0 10px black;
    border-radius: 10px;
  }
  button {
    margin-left: 10px;
  }
</style>